iChat will not start up. Internet working perfectly fine!

My iChat won't start up. I've tried the 443 Port already, I've searched for the com.apple.iChat stuff, but I couldn't seem to find it. Meebo, Airaim, and Aimexpress will not allow me to log in either. My sister can log in, and we have the same computers. What can I do?

My iChat won't start up. I've tried the 443 Port already, I've searched for the com.apple.iChat stuff, but I couldn't seem to find it. Meebo, Airaim, and Aimexpress will not allow me to log in either. My sister can log in, and we have the same computers. What can I do?

Macbook Pro.

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if u cant find the files then use something like appdelete or appcleaner just remember to untick the ichat app in the process but remove the rest

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